弹性模量对框架预应力锚杆支护边坡坡面变形影响分析  

Analysis of influence of elastic modulus on surface deformation of slope supported by frame structure with prestressed anchor

作　　者：叶炜钠 周勇[1,2] 叶帅华[1,2] YE Wei-na;ZHOU Yong;YE Shuai-hua(Key Laboratory of Disaster Mitigation in Civil Engineering of Gansu Province,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2024年第2期136-141,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51568042,51768040)。

摘　　要：基于强度折减法,通过实际工程案例对三种弹塑性模型下边坡失稳过程进行数值分析,探究边坡坡面变形规律,研究不同弹塑性模型下土体粘聚力和内摩擦角对边坡坡面变形的影响.结果表明:对边坡坡面变形影响最大的为变模量弹塑性模型,最小的是理想弹塑性模型;采用变模量和弹性模量线性增加弹塑性模型计算的变形更加趋近实际的变形.通过变形突变点对应的折减系数得到安全系数,为变形和边坡安全系数建立关系提供思路、为边坡监测预警系统的建立提供借鉴,对未来边坡工程信息化的进展有着重要意义.Based on strength subtraction,through practical project cases,the slope failure process under the three kinds of elastoplastic models w analyzed numerically to explore the slope surface deformation law in this process.The results show that the safety factor is obtained by the reduction coefficient corresponding to the deformation mutation point,which provides ideas for the study of the relationship between deformation and slope safety factor.And that conducives to the establishment of slope monitoring and early warning system,and is of great significance to the progress of slope engineering informatization in the future.

关 键 词：边坡 弹性模量 变形 强度折减法 

分 类 号：TU470.1[建筑科学—结构工程]